Punching shear resistor (PSR) studs are large-headed shear connectors that are welded to flat steel bars (creating stud rails) and used for shear reinforcement in flat concrete slabs to replace stirrups and column capitals to resist the punching shear stress in the slabs.

The PSR12-093-11 is 3/4″ in diameter by 5-13/16″ in length before welding. Length is approximately 3/16″ shorter after welding. It is made of low carbon steel, ASTM A108 / A29, 1010-1020.

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